https://github.com/spring-projects/spring-framework: Spring Core (Spring IO)
  • Juergen Hoeller 
Generic abstraction for (file-based) resources, used throughout the framework.

/**
 * Generic abstraction for (file-based) resources, used throughout the framework.
 */
@NonNullApi
@NonNullFields
package org.springframework.core.io;

import org.springframework.lang.NonNullApi;
import org.springframework.lang.NonNullFields;